Automatic shoe-sole-sewing machine.



P. WEYL, AUTOMATIC SHOE SOLE SEWING MACHINE- Patented June 6, 1916.

4 sns APPLICATION FILED SEPT- 13, 191 1.

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P. WEYL.

. AUTOMATIC SHOE SOLE SEWING MACHINE.

APPLICATION FILED SEPT. 13, I911. 1,1 86,054. Patented June 6, 1916.

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THE COLUMBKA PLANOORAPH co.. WASHINGTON. n. c.

P. WEYL.

AUTOMATIC SHOE SOLE SEWING MACHINE.

APPLICATION FILED SEPT. 13, 1911.

1,186,054. Patented June 6,1916.

4 SHEETS-SHEET 3.

E 79 v n ,...i 55 J P. WEYL.

AUTOMATIC SHOE SOLE SEWING MACHINE.

APPLICATION FILED SEPT-13,1911.

Y Patented-June 6, 1916.

4 SHEETS HEET Inventor:

THE coummm PLANOGRAPH cm, WASHINGTON, o. c.

UNITED STATES PATENT OFFICE.

PETER WEYL, OF BENFELD, GERMANY.

AUTOMATIC SHOE-SOLE-SEWING MACHINE.

Application filed September 13, 1911.

To all whom it may concern:

7 the other edgewise.

The sewing of soles by means of double thread for shoes of the kind in which the soles are composed of layers placed one against the other has hitherto been done either by hand or by machine and handwork combined. Further, the machine merely pierced the sole in order to allow the sewing thread to. pass through the same more easily, or the thread was engaged by the machine itself after it had been placed by hand on the hooked needle, whereupon the tightening of the thread and the finished work had also to be done by hand.

The present invention relates to a machine which sews the sole by means of a double thread completely automatically and at the same time adapts itself perfectly during its work to the shape of the sole by pulling out the thread to a suitable extent at places of small breadths of sole so as to'obtain an equal tension throughout. Further the pointed ends at the beginning and at the end of the sole are sewn more narrowly so as to avoid the projection of extended stitches in oblique or curved directions and to obtain the same solidity throughout as a greater number of stitches are required precisely at these places at the point of the sole inorder to make them secure. The sole is further completely inclosed in a work holder which controls the machine automatically at the beginning and end of the work done so that the needle moves more precisely and cannot abut against pieces of the iron frame work thus rendering the supervision by an operator unnecessary.

One method of carrying out the object of the present invention is. shown on the accompanying drawings in which:

Figure 1 is a front elevation of the machine. Fig. 2 a plan view of the same. Fig. 3 a section on line AB of Fig. 2. Fig. 4 a detail View of the actuating mechanism. Fig. 5 is a front view of the thread guiding device. Fig. 6 is a side view of the Specification of Letters Patent.

Patented June 6, 1916.

Serial No. 649,027.

thread guiding device. Figs. 7 to 9 are detail views of the sole guides. Figs. 10 and 11 are detail views showing the special ar rangement of the tensioning of the thread. Fig. 12 is a front elevation of the machine disengaging device. Fig. 13 is a view of the thread guide at the moment when the thread is being introduced into the needle. The crank shaft d is arranged on the bed a and is connected by a bifurcated link f to the crosshead g horizontally guided in carriages and carrying the needle 71. As the needle must turn during the sewing operation, a pin is is arranged on the needle bar it which passes along cam surfaces so that when moving forward or backward the pin must turn through a half revolution to rotate the needle rod h to one side or the other. The cam surfaces are formed by the inclined planes Z and m which are connected by members n and 0. In Fig. 2 the needle is shown in its outermost position. WVhen the needle is withdrawn from this position, the pin is slides along the member 0 until it reaches the plane Z and is thereby thrust into the corner between the plane Z and the connecting piece a when. the needle will have made one-half revolution. The operation is then reversed and the pin slides upon the parts a, m, when the needle is moving forward.

The soles consisting of layers freely placed one beside the other lie edgewise between two plates p and (1 (Figs. 7 and 8), the plate 39 of which is rotatable in ournals p and in use the sole is firmly pressed between the plates by means of an eccentrically mounted pressing mechanism consisting of a lever 1" provided with a hook s pivoted at 7) and. of a bent rod 2,. When the lever r is turned in the direction of the arrow 112, Fig. 7 then the hook s and the rod 15 release the rotatable plate 7) so that it may be lifted to permit the introduction of a sole to be operated upon and the removal of the finished sole. Between the plates p and 9, plates 70 are arranged connected by pins. Projections are arranged on the rotatable plate 79 which serve to stop the machine and to regulate the widths of the stroke of the needle bar and therefore also the length of the thread. In case thin soles are to be operated upon, grooves u are arranged in the sole plates 70 so that the needle does not strike or rub against iron frame parts. The inner edges of the sole plates are curved so that they, fit closely upon the edges of the loose sole and the loose sole is firmly clamped sidewise. At both ends of the sole plates 70, plates 80 are arranged, provided with slots. '21 in which the pins 81 of the plates engage.

A projection or nose w in the plate 9 engages a perforation in the chain y driven by wheels 2. means of a hand wheel 1 and automatically by the operation of the machine through the wheel 2 by means of a pawl 3 standing under the action of a slide 4 held in its extreme outer position by means of a spring 4 The slide is operated (Figs. 2 and 4) by means of an inclined surface on the part which is engaged by a corresponding inclined surface on the rod 6 which latter is operated by means of a projection 7 on the cross-head g. The projection 7 strikes against the projection 8 on the rod (3 when passing backward and thereby takes the rod 6 along. The slide 4 is returned. by a spring and by the engagement of the inclined surfaces withdraws the bar 6 also. The inclined surface of the rod 6 presses against the corresponding inclined surface on the part 5 of the slide 4 so that the wheel 2 is each time turned forward two teeth. As at both ends of the shoe sole the stitches are closer to one another, than in the middle, the wheel 2 should only be put forward one tooth at a time and the slide 4 will be stopped at the correct point in its return stroke by means of a pin 10. This pin 10 is lifted by means of projections 11 on the slide (Fig. 8) against the action of a spring 12 into the path of the rear portion of the slide 4 (Fig. 4) and enters an elongated slot of the same and thereby prevents the slide from passing backward a greater distance than one tooth so that in these positions the sole slide can only be pushed forward the length of one teeth at a time.

A curved groove is arranged on the under side of the plate 9 of the sole slide corre sponding to the sole profile in which a pin 13 slides which moves forward by means of a connecting rod 14 a block 15 having an inclined surface (see Fig. 1). The position of this block adjusts the tension of the thread according to the thickness of the between substance by causing an earlier or later release of athread take-up. .Vhen the needle bar it moves forward a projection 18 arranged on the lower part of the cross-head g strikes against the spring controlled pawl 16 on a rod 17 which carries the thread takeup roller 28. and thereby carries the rod 17 with it. It carries the rod 17 along until the pawl 16 abuts against the block 15. The pawl 16 is then in such a position that it is released by the projection 18. The rod 17 is released and returned into its initial position by the end 20 of the lever 19 which stands under the control of the spring 24.

These wheels are driven by The spring 24 is secured to the base of the machine and is tensioned whenever the projection 18 moves the rod 17 toward the guide rails as the lever 19 is turned about the pivot 21 by a projection 011 the rod 17. The lever 19 is linked to the rod 22 which controls the thread clamping device ar ranged in front of the thread spool for the purpose of holding the thread when the latter is tensioned so that the thread cannot unwind from the roller 23 and the thread in the sole is kept tensioned. The thread 27 is held by means of a spring controlled block 26 arranged on the rod 22 which engages a guide block 25 movably secured to said rod 22 and holds fast the thread lying between them at the moment when the thread is pulled outward by means of a roller 28 on the rod 17. The thread passes from the thread take-up roller 28' (Figs. 5 and 6) to a. pivoted guide tube 30, 31, controlled by means of a spring 29 and part of which is cut away at the pivoting point so as to expose the thread and to enable a spring lever 32 to exert a light pressure on the same. As may be seen from Fig. 6, the thread passes from the tube 31 through a slot 71 in the frame into the guide channel w.

The thread withdrawing member 34. is U- shaped and is guided by members 35 and 36. A projection 72 is arranged on the member 34 which abuts against the guide block The thread pulloff 34 is provided at its shortened end with a hook 323 which lies directly in front of the slot 71 and in the end position shown in Fig. 5 lies directly opposite the thread. In this position the thread pull-off 34 is held by a spring 37 on the machine frame, which engages members 38 connected to the pull-off. The thread therefore lies in the slot at right angles to the surface of the pull-off Should therefore the hook 33 of the pull-off move against the action of the spring then a correspond ing length of thread will be drawn through the thread guide 30, 31 (Fig. 6), as of course the free thread end is securely held. The pin 39 on the lever 39 engages in an opening in the underside of the member and may be turned by means of a rod 40 and a lever 41. The lever 41 is connected to the rod 42 (Figs. 1 and 2) which is operated by means of a lever 45 pivoted on an axle 43 and controlled by a spring 44, the free end of which lever 45 is pressed back once in each revolution by means of a rock ing arm 46, turned by the shaft (Z. On the upper side of the member 38 an inclined plane 47 is arranged which operates a lever 48 to move the guide tube 30, 31 downward so that the thread is placed into the needle hook and taken along with the same.

In order to prevent the needle from striking against the iron parts of the frame and in order to insure that it is moved only when the slots in the sole slide lie in the path of the needle, care must be taken that the machine after completing the sewing operation is automatically stopped and not set to work again until a stop lever which is lifted by the slide is pushed to one side and after the sewing is completed is automatically released. A projection 49 (Figs. 1, 8 and 12) is arranged at the front of the sole slide which operates on a spring controlled lever 50 provided with a bent end 73 and pivoted to the machine base. The bent end '73 turns the operating rod 51 of the cou pling 52 about its axis 7 1 and thereby brings the main coupling 52 of the machine into engagement. At the other end of the sole slide a projection 53 is arranged on the plate which by moving the lever 54 serves to antomatically disengage the coupling for the drive when the sewing of the sole is completed. This lever 5st is adjacent to a feeler arm 55 which is pivoted to a rod 76 at 80, said rod 76 being connected to the rod 51 by a link 7 5 pivotally secured to said rod at 74. The rod 7 6 is in turn connected to a pivoted lever 77 by means of a slot and pin connection. The lever 77 is connected to a stop block 57. A spring 7 8 holds the parts in the position illustrated in Fig. 2. A spring stop 59 is mounted on the end of the lever 55. At the completion of the sewing of a sole, the projection 53 pushes the lever 54 in the direction of the arrow 101, so that as the needle moves back, the projection 56 strikes the spring projection 59 which imparts a shock to the member 7 5 and thereby turns the rods 51, 55, 75 and 76 about the pivot 74. The part 56 disengages from the part 59 after impacting upon it and proceeds to the completion of its rearward stroke. The coupling 52 is freed by this movement and the stop block so displaced that the crank (Z strikes it and brings the machine to a standstill with the needle bar 72. in the correct position.

If the thread guide according to Figs. 5 and 6 is used, the needle, at the moment at which the thread is introduced into it from above, is turned downward and the needle member with its hooked face upward; the cam control should, for this reason, be so arranged that the hooked face of the needle receives the thread from above when the position beneath the thread guide is reached.

In the modified form according to Figs. 10 and 11, the thread is introduced from the side.

I claim:

1. In an automatic sewing machine, in combination, a crank shaft, a bifurcated link operated by said crank shaft, a cross-head operated by said link, a needle bar carrying a hook needle operated by said cross head, means for axially revolving said needle bar, means for automatically inserting the thread into the needle hook, a sole clamping slide, means for operating said slide upon the operation of said cross-head, means for stopping the operation of said slide at a predetermined moment and place, and means controlled by said slide for. pulling the thread, substantially as described.

2. In an automatic sewing machine, in combination, a crank shaft, a bifurcated link operated by said crank shaft, a cross head operated by said link, a needle bar carrying a hook needle operated by said cross head, means for axially revolving said needle bar, a sole clamping slide, an endless band for driving said slide, a variable stroke take-up controlled by said slide according to the width of the sole, means for automatically retarding the advance of said slide at the stitching of the end parts of the sole for making the stitches closer together at these parts, and means for clamping the plates of said sole clamping slide firmly together over the parts of the sole, substantially as described.

3. In an automatic sole sewing machine in combination, a crank shaft, a bifurcated link operated by said crank shaft, a crosshead operated by said link and carrying the needle, a projection on said cross-head, a spring controlled rod carrying a pawl and a thread take-up adapted to be operated by said projection, for pulling the thread, and means for releasing the engagement between said pawl and said projection for stopping the thread pulling action.

4:. In an automatic sole sewing machine in combination, a crank shaft, a bifurcated link operated by said crank shaft, a crosshead operated by said link and carrying the needle, a projection on said cross-head, a spring controlled rod carrying a pawl and a thread take-up adapted to be operated by said projection, for pulling the thread, and adjustable means for releasing the engagement between said pawl and said projection for stopping the thread pulling action and for changing the length of the thread pulled out according to the width of the sole to be sewed.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

PETER WEYL.

Witnesses:

Dr. SInornin HAUsE, AUGUST Oos'rnnaran.

Copies 01 this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

